Apparatus for and method of molding



June .3 [924.

R. SHURTLEFF APPARATUS FOR AND METHOD OF MOLDING Filed Nov. 1 1921 2 Sheets-Sheet 1 June 3, 1924. 1,496,179

R. SHURTLEFF APPARATUS FOR AND METHOD OF MOLDING Filed NOV. 19. 19?

2 Sheets-Sheet 2 iiatented June 3,1924.

RALPH S I-IURTLEFF, OF CHICAGO, ILLINOIS.

APPARATUS FOR AND METHOD OF MOLDING.

Application filed. November 19, 1921. Serial No. 516,271.

To (ZZZ whom it may concern:

Be it known that I, RALPH SHURTLEFF, a citizen of the United States of America, and a resident of Chicago, in the county of Cook, in the State of Illinois, have invented certain new and useful Improvements in Apparatus for and Methods of Molding, of which the following is a full, clear, and exact description, reference being had to the accompanying drawings, forming a part of this specification.

This invention relates to improvements in apparatus for and methods of molding, and has for its object the production of a simple apparatus and method for molding articles that cannot be readily molded by the methods heretofore in general use.

In following the ordinary methods, considerable difficulty has been experienced in molding from irregular patterns which cannot be readily withdrawn from the sand. One class of castings of which the above is true is metallic shoe heels, and such articles can be easily and quickly molded in accordance with this invention.

The method heretofore pursued in the molding of metallic shoe heels involved a great amount of hand work which can only be performed by an expert molder, and only a comparatively few heels could be formed in a single flask due to the inability to properly ram the sand about the patterns.

The present invention includes a flask which is so arranged that the sand may be Well as from the top and bottom, so the sand can be very tightly packed around the pattern members within the flask.

Briefly stated my improved flask preferably comprises a cope, a drag, and a cheek interposed between said cope and drag. The cope and drag may be of the usual form, i. 8., top and bot-tom receptacles into which the sand is forced in the usual manner. The cheek preferably'oomprises a receptacle having sand receiving openings at its sides, and at one of its ends, and it preferably includes upper and lower match plates separated from each other to provide a sand-receiving space between them. Each of said: match plates may be provided with rows of pattern members which extend into the sandreceiving space. The side'and end sandreceiving openings permit the sand to be forced into said flask from the sides, as

forced into this space and around the pat-- tern members therein.

With the foregoing and other objects in view, the invention comprises the novel construction, combination and arrangement of parts hereinafter more specifically described and illustrated in the accompanying drawings wherein is shown the preferred embodirammed and the match plates being shown between the cope and drag.

Fig. II is a view similar to Fig. I showing the flask as it appears after the match plates and sprue pattern have been removed.

Fig. III is a plan of the flask with the cope removed and with parts of the upper match plate broken away.

Fig. IV is a perspective, on a small'soale, of the cheek frame.

I11 the drawings A designates .the flask which comprises a cope B, which is of the usual form, i. 'e., a topless and bottomless bo-Xlike body into which sand is forced onto the pattern member contained therein, and a drag C similar to the cope B which is also adapted to receive sand forced into and around a pattern member contained therein.

Interposed between the cope B and the drag C in the assembled flask is a check D which includes a frame D (Fig. IV) composed of transverse end members 1 and pairs of longitudinal side members 2 se c'ured'to said end. members 1. Said frame D is provided with dowels 3 and recesses 3' whereby said frame is interlocked with the cope B and drag C when the flask is infan assembled condition.

interposed between the cope B and the frame D is an upper match plate a which is provided'on itsupper and lower sides with rows of pattern members 5. A pattern member 6 is also provided on said upper match plate to form the gate 7 and part of the sprue 8, the upper portion of said sprue being formed by a separate pattern member 9. y

10 designates a lower match plate which in so far as the plate itself is concerned is a counterpart of the match plate 1, and is provided with rows of pattern members 11 which extend from said plate 1' and meet the pattern members 5.

To insure against displacement of the match plates 1 and 11 with relation to their associated parts I provide each, of said .match plates with dowels 12 (Figs. 1 and II) which are adapted: to enter suitable recesses formed in said associated parts. and as a precaution against displacement of said match plates with relation to one another I provide each pattern member 5 of the upper match plate 4.- with a dowel 13, and each pattern member 11 of the lower match plate 10 with recess 14 which is adapted to. receive the dowel 13. The dowels 13 and the recesses 141 are arranged on the meeting faces of said pattern members 5 and 11 so that when the flask is assembled the danger of the match plates moving with relation to one another is eliminated.

As an illustration of a suitable means for forcing sand between the match plates 4 and 10 and into engagement with the pattern members thereon, I have shown members 15, although it is to be understood that the invention is not limited to any particular means for forcing sand into a flask. The members 15 are adapted to enter. the Sandmeceiving openings 16 in the sides of the frame D.

As is shown in the drawings, the pattern members on the match plates are in rows and it would be a rather difficult matter to force sand from the sides of the cheek, between the individual pattern members and into the open center between said rows of said pattern members. Therefore, to insure the sand being tightly packed within this open center, 1 may employ a rammcr 17 which is adapted to extend into the cheek D through av sand receiving opening 18 in one of the end members 1 of the frame D. By the use of this ramme-r 17, the sand introduced through said sand-receiving opening 18 may be tightly rammed in the cavity between the rows of pattern members.

In the practical use of my invention the cope, the drag, and the cheek are assembled as shown in Fig. I with the match plates in place, The sand is then forced into the cope and drag in any suitable manner. The rammer 17 is passed through the opening 18 to serve asa filler between the rows of patterns, and sand is then introduced through the openings in the sides of the cheek frame D and packed tightly around the pattern members in the check. It will be observed by referring to Fig. I that when the sand is being forced into the cheek D from the sides thereof that the rammer 17' is in place in said cheek and Will act as a solid backing against which said. sand may be forced, to tightly pack said sand on each side of said rammer 17. After the sides of the cheek D have been tightly rammed. the raminer 1? is withdrawn and sand introduced through the opening 18 and this sand is tightly packed in place by the reciprocation of said rammer 17, during which operation the members 15 are allowed to remain in the position in which they are shown in F I to avoid disturbance of the sand that has already been packed in the sides of the cheek.

The ramming is now complete and the sprue pattern 9 may be removed from the cope and said cope lifted from the match plate 1, after which said match plate 4.- may be lifted from the lower match plate, there by drawing the pattern members thereon from the sand in saidcheek. The check frame D from which the members 15 have previously been removed is now lifted from the lower match plate 10 and said match plate 10- removed from the drag.

A. reassembly after the removal of the match plates will place the flask in the condition shown in Fig. II, and said flask is ready for the pouring of the metal. The intermediate bodies of sand, which are molded between the match plates, then lie between and in contact with the sand in the cope and drag.

I claim:

1. In a molding apparatus, a flask comprising a cope, a drag, and a check between said cope and drag, said cope, drag and cheek having flat marginal faces and said check comprising upper and lower match plates and pattern members separating said match plates, said check being provided. with an opening at one of the flat marginal faces thereof, and means whereby sand is forced through said opening, between said match plates and into engagement with said pattern members.

2. In a molding ap- 'iarai us. a flask comprising a cope, a drag, and a cheek between said cope and drag, said cope, drag and cheek having fiat marginal faces and said cheek. comprising upper and lower match plates. pattern members separating said match plates, means whereby said pattern members are interlocked with each other, aid cheek being provided with an opening at one of the flat marginal faces" thereof, and means whereby sand-is forced through said opening, between said match plates into engagen'ient with said pattern members.

3. In amolding apparatus, a flask comprising a cope, a drag, and a cheek between said cope and drag, said cope, drag and cheek having fiat" marginal faces and said check comprising upper and lower match plates, pattern members separating said match plates, and means comprising dowels projecting from the pattern member of one match plate and extending into the pattern member of the other match plate whereby said pattern members are interlocked with each other, said cheek being provided with an opening at one of the flat marginal faces thereof, and means whereby sand is forced through said opening and between said giatch plates to engage said pattern memers.

'4. In a molding apparatus, a flask comprising a cope, a drag, and a cheek between said cope and drag, said cheek comprising upper and lower match plates, pattern members separating said match plates, the pattern member of said upper match plate being adapted to be seated upon the pattern member of the lower match plate, means whereby said pattern members are interlocked with each other, and means whereby sand is forced into one of the sides of said flask and between said match plates to engage said pattern members.

5. In a molding apparatus, a flask comprising a cope, a drag, and a cheek between said cope and drag, said cheek comprising an upper match plate member closing the bottom of the cope, a lower match plate member closing the top of the drag and pattern members separating said match plate members, said flask being provided with a sand-receiving opening between said match plate members at one of its sides, and means whereby sand is forced into said opening between said mat-ch plate members and into engagement with said pattern members.

6. In a molding apparatus, a flask comprising acope, a drag, and a cheek between said cope and drag, said cheek comprising upper and lower match plates and rows of pattern members separating said match plates, said flask being provided with sandreceiving openings between said match plates at one of its sides and at one of its ends, and means whereby sand is forced into said openings, between said match plates find into engagement with said pattern memers.

7. In a molding apparatus, a flask comprising a cope, a drag, and a cheek between said cope and drag, said cheek comprising upper and lower match plates and rows of pattern members separating said match plates, said flask being provided with sand receiving openings between said match plates at one of its sides and at one of its ends, and means whereby sand is forced into said openings.

8. The method of molding shoe heels which comprises forming upper and lower match plate members with shoe heel pattern members between them, interposing said match plate members between a cope and a drag so as to completely close the top of the drag and the bottom of the cope, said match plates being arranged in such positions that the pattern members of the upper match plate rest upon the pattern members of the lower match plate, forcing sand into the cope and drag and into engagement with the respective match plate members, forcing sand through opposite sides of the flask and into engagement with opposite sides of said pattern members, removing the match plate members and pattern members from the cope and drag, and reassembling the flask with the last mentioned sand between the cope and drag.

In testimony that I claim the foregoing I hereunto aflix my signature.

RALPH SHURTLEFF. 

